Preferred Label : dentary;
Uberon definition : The dentary is a dermal bone that forms the antero-lateral part of the lower jaw in
fishes and amphibians, extending to the whole lower jaw in mammals[VHOG,modified].;
Uberon synonym : dentary bone; dentaries;
Uberon related term : os dentale; sur-angulaire; dentale;
Uberon Homology note : Of all these bones [dentary, splenials, coronoids, angular, surangular and prearticular],
only the dentary remains in the lower jaw of a mammal.[well established][VHOG];
Uberon Taxon note : In lobe-finned fishes and the early fossil tetrapods, the bone homologous to the mandible
of mammals is merely the largest of several bones in the lower jaw. In such animals,
it is referred to as the dentary bone, and forms the body of the outer surface of
the jaw. It is bordered below by a number of splenial bones, while the angle of the
jaw is formed by a lower angular bone and a suprangular bone just above it. The inner
surface of the jaw is lined by a prearticular bone, while the articular bone forms
the articulation with the skull proper. Finally a set of three narrow coronoid bones
lie above the prearticular bone. As the name implies, the majority of the teeth are
attached to the dentary, but there are commonly also teeth on the coronoid bones,
and sometimes on the prearticular as well. This complex primitive pattern has, however,
been simplified to various degrees in the great majority of vertebrates, as bones
have either fused or vanished entirely. In teleosts, only the dentary, articular,
and angular bones remain, while in living amphibians, the dentary is accompanied only
by the prearticular, and, in salamanders, one of the coronoids. The lower jaw of reptiles
has only a single coronoid and splenial, but retains all the other primitive bones
except the prearticular.;
Origin ID : 0004742;
develops from
- has developmental contribution from
- has part
- in lateral side of
- part of
The dentary is a dermal bone that forms the antero-lateral part of the lower jaw in
fishes and amphibians, extending to the whole lower jaw in mammals[VHOG,modified].
